The is a common power supply and inverter board used extensively in LCD monitors, most notably within various Vizio and HP models. Finding an updated schematic is crucial for technicians looking to resolve common power-on failures or "black screen" issues. 1. Overview of the ILPI-354 VA Board
The +5V and +12V rails are regulated via Schottky diodes (e.g., D10 , D11 ). Leakage here is a common cause of "cycling" power lights. 3. Common Failure Points and Troubleshooting
By following the updated ILPI-354 VA schematic, you can transition from "board swapping" to component-level repair, saving costs and reducing electronic waste. ilpi354 va schematic updated
Look for components labeled CX1 and LF1 . Blown fuses ( F1 ) in this area usually indicate a catastrophic failure in the Bridge Rectifier.
Look for bulging or leaking tops on the secondary side (C202, C204). Even if they look fine, high ESR (Equivalent Series Resistance) can prevent the monitor from waking from standby. The is a common power supply and inverter
If you have no power light, verify the 5V standby rail first.
If the backlight flashes and goes out, the ILPI-354 VA protection circuit is likely tripping due to a bad lamp or a faulty inverter transformer. Overview of the ILPI-354 VA Board The +5V
The ILPI-354 VA functions as the primary power delivery system for the monitor. It converts AC mains voltage into the DC voltages required by the logic board and the high-voltage AC needed to drive the Cold Cathode Fluorescent Lamps (CCFL) or LED backlights. 100-240V AC Typical Outputs: +5V (Logic), +12V (Inverter/Audio) Form Factor: Integrated Power + Inverter (LIPS board) 2. Updated Schematic Breakdown
The "Hot Side" of the ILPI-354 VA contains a large filter capacitor that can hold even after the unit is unplugged. Always discharge this capacitor safely before touching the underside of the PCB. 5. Repair Tips for Modern Technicians